#!/usr/bin/python3
# -*- coding: utf-8 -*-

# created by mario chen, 01.04.2021, shenzhen
# my github site: http://www.51sjk.com/Upload/Articles/1/0/251/251023_20210626000324399.jpg

import sys
import os
from pil import image

size_cut = 4   # picture over this size should be compressed. units: mb
quality = 90  # 90 is good, this number should not be smaller than 80.


def ispic(name):
    namelower = name.lower()
    return namelower.endswith("jpeg") or namelower.endswith("jpg") or namelower.endswith("png")


def compressimg(file):
    #print("the size of", file, "is: ", os.path.getsize(file))
    im = image.open(file)
    im.save(file, quality=quality)


def compress(folder):
    try:
        if os.path.isdir(folder):
            print(folder)
            file_list = os.listdir(folder)
            for file in file_list:
                if os.path.isdir(folder+"/"+file):
                    #print(folder +"/"+ file)
                    compress(folder +"/"+file)
                else:
                    if ispic(file):
                        if os.path.getsize(folder + "/" + file) > (size_cut * 1024 * 1024):
                            compressimg(folder + "/" + file)
                            print(file)
        else:
            if ispic(folder):
                if os.path.getsize(folder) > (size_cut * 1024 * 1024):
                    compressimg(folder)
    except baseexception:
        return


if __name__ == '__main__':
    for folder in sys.argv:
        #print(folder)
        compress(folder)
    print("finish.")
    #os.system("pause")

import os
from pil import image
import threading,time

def imgtoprogressive(path):
    if not path.split('.')[-1:][0] in ['png','jpg','jpeg']:  #if path isn't a image file,return
        return
    if os.path.isdir(path):
        return
##########transform img to progressive
    img = image.open(path)
    destination = path.split('.')[:-1][0]+'_destination.'+path.split('.')[-1:][0]
    try:
        print(path.split('\\')[-1:][0],'开始转换图片')
        img.save(destination, "jpeg", quality=80, optimize=true, progressive=true) #转换就是直接另存为
        print(path.split('\\')[-1:][0],'转换完毕')
    except ioerror:
        pil.imagefile.maxblock = img.size[0] * img.size[1]
        img.save(destination, "jpeg", quality=80, optimize=true, progressive=true)
        print(path.split('\\')[-1:][0],'转换完毕')
    print('开始重命名文件')
    os.remove(path)
    os.rename(destination,path)

for d,_,fl in os.walk(os.getcwd()):    #遍历目录下所有文件
    for f in fl:
        try:
            imgtoprogressive(d+'\\'+f)
        except:
            pass